Aggregation is the process of determining whether emissions from multiple locations should be aggregated into a single source for air permitting purposs. In the Marcellus Shale play, it's a big environmental issue and Reed Smith environmental attorneys are focused on it in a few ways. Reed Smith represents a defendant in an aggregation case and we also examined aggregation issues in a teleseminar yesterday. The teleseminar, presented with AECOM, discussed U.S. Environmental Protecton Agency guidance, federal aggregation cases, state aggregation cases and some of the pitfalls of aggregation. Feel free to review the slides and the audio from the event.